S-93085A017 2-56 x 1/4" FF-S-92, QQ-P-35, NAS662C2R4, SAE AMS2700 Stainless Steel Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with passivated 18-8 stainless steel construction, ideal for harsh industrial environments
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B70 hardness for reliable load-bearing performance
• Precise Class 2A thread fit ensures smooth installation and secure fastening in UNC coarse thread applications
• Optimized flush mounting with standard 100° countersink angle and flat head design for seamless surface integration
• Enhanced drive engagement through Phillips No. 1 drive style, reducing cam-out risks during installation
• Full threading coverage along the 1/4" length provides maximum grip and uniform stress distribution
• Comprehensive regulatory compliance with RoHS 3 and REACH standards, ensuring environmental and safety adherence

Professional Applications & Engineering Value

This 2-56 UNC flat head Phillips screw delivers critical engineering solutions where corrosion resistance and structural integrity are paramount. Manufactured from passivated 18-8 stainless steel, it effectively combats oxidation and chemical degradation in demanding settings like marine equipment, electronic enclosures, and automotive assemblies. The fully threaded coarse UNC design combined with Class 2A thread fit enables rapid installation and vibration-resistant fastening, minimizing loosening in dynamic operations. The 100° countersink angle and flat head profile allow for flush surface mounting, eliminating protrusions in precision machinery and aerospace components. These attributes make it indispensable for OEMs and maintenance teams requiring durable, regulation-compliant stainless steel fasteners that uphold long-term performance under stress.

Specification Summary & Compliance

This screw maintains Class 2A thread fit per UNC standards with a coarse thread spacing, ensuring dimensional accuracy and interchangeability. It conforms to Fed. Spec. FF-S-92, QQ-P-35, NAS662C2R4, and SAE AMS2700 manufacturing specifications, guaranteeing consistent quality. The product is fully RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, adhering to environmental and substance restrictions for global industrial use.